|Four railroads crossed the Altamaha: the Atlantic Coast Line, the Seaboard, the Georgia & Florida, and the Georgia Coast & Piedmont. The GC&P bridge at Darien is long gone, but the bridges of the other three remain in place. Only the ACL bridge, near Jesup, is currently in use (by CSX).
This bridge, about 30 miles upstream from the Atlantic, was the Seaboard's. Crossing the river's main channel using a pair of fixed through-truss spans and a plate-girder swing span, it carried not only many thousands of freight trains but also such well-known passenger trains as the Silver Meteor and the Orange Blossom Special.
Seaboard merged with ACL in 1967, forming the Seaboard Coast Line, which, in the early 1980s, became part of CSX. Not needing two parallel main lines along the Georgia coast, CSX chose to abandon the middle section of the former Seaboard, a segment that included this bridge. With the trains permanently gone, the swing section was left open for river navigation.